Engineering Calculators & Tools
Interactive electrical, mechanical, structural, civil, and fluid dynamics engineering simulation and modeling tools. Professional engineering principles, FE/PE exam foundations, structural beam analysis, fluid flow, and circuit calculations.
Ohm’s Law & DC Power Calculator
Calculate Voltage (V), Current (I), Resistance (R), and Power (P) across DC circuits
Resistor Calculator (Series, Parallel & Color Codes)
Calculate Series and Parallel equivalent resistance with 4-band color code interpretations
Capacitor Calculator (Energy & RC Time Constant)
Calculate stored charge Q = C·V, electrostatic energy E = ½CV², and RC time constant τ
Inductor Calculator (Energy & RL Time Constant)
Calculate stored magnetic energy E = ½LI² and RL transient time constant τ = L / R
Power Factor & AC Power Triangle Calculator
Calculate Real Power (kW), Reactive Power (kVAR), Apparent Power (kVA), and PF correction
Electrical Load & Ampacity Calculator (1Φ & 3Φ)
Calculate full load operating current and circuit breaker sizes for Single-Phase and Three-Phase systems
Gear Ratio & Speed Reducer Calculator
Calculate gear ratio, output RPM reduction, and multiplied output torque with mechanical efficiency
Torque & Rotational Horsepower Calculator
Calculate mechanical torque τ = F·r and rotational power in Watts and Imperial Horsepower (HP)
Stress & Factor of Safety Calculator
Calculate normal tensile/compressive stress σ = F/A and design safety factors (SF)
Strain & Hooke’s Law Calculator
Calculate engineering strain ε = ΔL/L₀ and elastic stress from Young’s Modulus (E)
Euler-Bernoulli Beam Deflection Calculator
Calculate maximum beam deflection δ_max and bending moment M_max under point and uniform loads
Pipe Flow & Volumetric Discharge Calculator
Calculate volumetric discharge Q = A·v, velocity, and Darcy-Weisbach friction head loss
Reynolds Number & Flow Regime Calculator
Calculate dimensionless Reynolds number Re and classify Laminar, Transitional, or Turbulent flow
Engineering Unit Converter (Pressure, Force, Power)
Convert between SI and US Customary units for Pressure, Stress, Force, Torque, and Power
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